Top-rated radon detection and reduction specialists.

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Avatar for The Radon Bros

The Radon Bros

5.00(
5
)
Approved Pro

The Radon Bros

5.00(
5
)
Approved Pro
Super Service Award
Customers say: Terrific value
2018 years of experience
Free onsite estimate

The Radon Bros is a certified provider specializing in radon testing, mitigation, and system repairs for homes, businesses, and schools across Pennsylvania, Delaware, and Maryland. They also offer mold testing and comprehensive indoor air quality assessments to ensure safer living and working environments. The company provides tailored solutions, including radon system installation and expert consultations for contractors, with a commitment to safety, health, and air quality.

"They were really helpful and polite they explained the job from start to finish and they explian how radon is harmful."

David R on November 2025

The Radon Bros is a certified provider specializing in radon testing, mitigation, and system repairs for homes, businesses, and schools across Pennsylvania, Delaware, and Maryland. They also offer mold testing and comprehensive indoor air quality assessments to ensure safer living and working environments. The company provides tailored solutions, including radon system installation and expert consultations for contractors, with a commitment to safety, health, and air quality.

"They were really helpful and polite they explained the job from start to finish and they explian how radon is harmful."

David R on November 2025


Avatar for SIS Mold & Home Inspections

SIS Mold & Home Inspections

5.00(
2
)
Approved Pro

SIS Mold & Home Inspections

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2015 years of experience

We are a small, veteran-owned local business, your safety is our priority. We inspect and test for mold and radon. SIS only performs testing and inspections, not remediation. We have no conflict of interest. For mold testing and inspections, you will receive a report that is clear and easy to understand with lab results interpreted. The mold inspector has done thousands of inspections and tests in the Delaware valley and keeps current with mold education. For radon testing, SIS uses Continuous Radon Monitors (CRM's) to perform short term tests. We provide professional test results and reports. PA state license # 3589 and nationally certified (NRPP).

"Bob from SIS is a straight shooter, provides options, clear explanations and associated costs on the necessary steps to remediate the problem. Good communication, timely and professional. Pleasantly surprised with my experience with SIS and the contractor they recommended to do the work. Easy 5-star rating, not too common these days."

Dennis H on February 2024

We are a small, veteran-owned local business, your safety is our priority. We inspect and test for mold and radon. SIS only performs testing and inspections, not remediation. We have no conflict of interest. For mold testing and inspections, you will receive a report that is clear and easy to understand with lab results interpreted. The mold inspector has done thousands of inspections and tests in the Delaware valley and keeps current with mold education. For radon testing, SIS uses Continuous Radon Monitors (CRM's) to perform short term tests. We provide professional test results and reports. PA state license # 3589 and nationally certified (NRPP).

"Bob from SIS is a straight shooter, provides options, clear explanations and associated costs on the necessary steps to remediate the problem. Good communication, timely and professional. Pleasantly surprised with my experience with SIS and the contractor they recommended to do the work. Easy 5-star rating, not too common these days."

Dennis H on February 2024


Landmark Inspections LLC

4.99(
97
)

Landmark Inspections LLC

4.99(
97
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Landmark Inspections LLC is owned and operated by its founding member/manager ASHI Certified inspector, Scott Freeman .

"Scott from Landmark Inspections performed a home inspection of the home my husband and I are purchasing. We are first time home buyers and this is our first home inspection. We were very impressed with Scott from beginning to end. Before the inspection, he was responsive and communcative, answering every one of our phone calls and emails. The inspection was thorough and Scott and his trainee inspector (also Scott) took the time to answer our questions and explain everything they were doing/finding. The inspection did not feel rushed or like Scott was trying to get through it to move on to the next. The report he sent us (48 hours after the inspection, great turn around time) was very throrough, contained useful information about our future home, and clearly laid out a heirarchy for recommended repairs. We also got a termite inspection, sewer scope inspection (which was also performed incredibly professionally by Melvin from Knox & Knox Solutions), and raydon test. In total, we paid a lot of money for these services, but it was money very well spent. We would not hesitate to recommend Scott, Landmark, and the other service professionals with whom he contracts."

Allison E on September 2020

Landmark Inspections LLC is owned and operated by its founding member/manager ASHI Certified inspector, Scott Freeman .

"Scott from Landmark Inspections performed a home inspection of the home my husband and I are purchasing. We are first time home buyers and this is our first home inspection. We were very impressed with Scott from beginning to end. Before the inspection, he was responsive and communcative, answering every one of our phone calls and emails. The inspection was thorough and Scott and his trainee inspector (also Scott) took the time to answer our questions and explain everything they were doing/finding. The inspection did not feel rushed or like Scott was trying to get through it to move on to the next. The report he sent us (48 hours after the inspection, great turn around time) was very throrough, contained useful information about our future home, and clearly laid out a heirarchy for recommended repairs. We also got a termite inspection, sewer scope inspection (which was also performed incredibly professionally by Melvin from Knox & Knox Solutions), and raydon test. In total, we paid a lot of money for these services, but it was money very well spent. We would not hesitate to recommend Scott, Landmark, and the other service professionals with whom he contracts."

Allison E on September 2020


Avatar for Radon-Rid LLC

Radon-Rid LLC

4.96(
212
)

Radon-Rid LLC

4.96(
212
)
Customers say: True professional
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers

With over 220 outstanding reviews, Radon Rid, LLC is a fully insured, licensed, and certified radon testing and radon remediation company. From me to my whole team, our focus is on providing quality, first, last, and always through education, workmanship, and environmental stewardship. We believe our goals are best attained through consideration of not only our customers, but our employees, suppliers, referring agents, and regulatory agencies.

"Very well. All were professional and friendly. Installation was clean. Test result prior to active mitigation was 38.4 and post active mitigation <.03 which is fantastic. Would highly recommend Radon-Rid."

Kathy A on April 2020

With over 220 outstanding reviews, Radon Rid, LLC is a fully insured, licensed, and certified radon testing and radon remediation company. From me to my whole team, our focus is on providing quality, first, last, and always through education, workmanship, and environmental stewardship. We believe our goals are best attained through consideration of not only our customers, but our employees, suppliers, referring agents, and regulatory agencies.

"Very well. All were professional and friendly. Installation was clean. Test result prior to active mitigation was 38.4 and post active mitigation <.03 which is fantastic. Would highly recommend Radon-Rid."

Kathy A on April 2020


Avatar for Royal Water Damage Restoration

Royal Water Damage Restoration

4.95(
106
)

Royal Water Damage Restoration

4.95(
106
)
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

For over 20 years, Royal Water Damage Restoration, Inc. has been providing professional and reliable water damage remediation, water removal, smoke, fire, flood cleanup, storm damage, asbestos testing and removal, wet basement drying, and mold services to our clients. We understand the urgency of emergency situations and as such, we are available 24 hours a day, 7 days a week, 365 days a year to attend to your needs. Our staff is highly trained and experienced, and we pride ourselves on always providing you with professional and thorough service. When you contact us, you will always speak with a live person who will dispatch our local, certified, and dedicated technicians to your location anywhere in the Philadelphia, Montgomery, Bucks, Delaware and Chester County areas. We are committed to providing rapid response and ensuring that the job is done right the first time.

"This was my first experience with this company and they exceeded expectations. The remediation was performed in a conpetent manner they alleviated the problem with the water damage and mole."

Rev. Dr. Robert C on September 2025

For over 20 years, Royal Water Damage Restoration, Inc. has been providing professional and reliable water damage remediation, water removal, smoke, fire, flood cleanup, storm damage, asbestos testing and removal, wet basement drying, and mold services to our clients. We understand the urgency of emergency situations and as such, we are available 24 hours a day, 7 days a week, 365 days a year to attend to your needs. Our staff is highly trained and experienced, and we pride ourselves on always providing you with professional and thorough service. When you contact us, you will always speak with a live person who will dispatch our local, certified, and dedicated technicians to your location anywhere in the Philadelphia, Montgomery, Bucks, Delaware and Chester County areas. We are committed to providing rapid response and ensuring that the job is done right the first time.

"This was my first experience with this company and they exceeded expectations. The remediation was performed in a conpetent manner they alleviated the problem with the water damage and mole."

Rev. Dr. Robert C on September 2025


"Nick was extremely thorough and knowledgeable. He went well above and beyond my expectations for a home inspection. Described in detail every potential issue from the absolute minor to the major. Nick's attention to detail was so good that he even pointed out how the HVAC contractor used the wrong kind of tape to affix the ducts to each other. He also has a lot of knowledge about the area, its history and how that affects the construction of the old homes that are so common here. I was absolutely blown away by Nick's work and strongly believe that no one should ever buy a house without having Nick and Strong Foundations inspect it."

Robert J on March 2021

LICENSE #24376.

"Nick was extremely thorough and knowledgeable. He went well above and beyond my expectations for a home inspection. Described in detail every potential issue from the absolute minor to the major. Nick's attention to detail was so good that he even pointed out how the HVAC contractor used the wrong kind of tape to affix the ducts to each other. He also has a lot of knowledge about the area, its history and how that affects the construction of the old homes that are so common here. I was absolutely blown away by Nick's work and strongly believe that no one should ever buy a house without having Nick and Strong Foundations inspect it."

Robert J on March 2021


Reliable Home Inspection Service

5.00(
38
)

Reliable Home Inspection Service

5.00(
38
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Reliable Home Inspection Service offers a variety of inspections related to the real estate transaction; Serving Delaware, Maryland and Pennsylvania, you can be assured that you will receive excellent customer service, especially with our one stop shop philosophy. Our computer generated report, which is delivered on-site, has been recognized nationally and locally as an extremely helpful tool for the real estate transaction. With 24-7 availability for scheduling and customer service, we are here to help serve you! We also offer a variety of discounts for you and look forward to the opportunity to be on your team and provide impeccable service to you as a buyer and seller.

"Paul Duhamel performed home inspection and everything went wells, It took about 3 hrs and he notified few issues in the house and he answered to all my questions. Very professional and to the point. I refereed to my friends and even he is also happy with the inspection they performed."

Sirisha B on June 2019

Reliable Home Inspection Service offers a variety of inspections related to the real estate transaction; Serving Delaware, Maryland and Pennsylvania, you can be assured that you will receive excellent customer service, especially with our one stop shop philosophy. Our computer generated report, which is delivered on-site, has been recognized nationally and locally as an extremely helpful tool for the real estate transaction. With 24-7 availability for scheduling and customer service, we are here to help serve you! We also offer a variety of discounts for you and look forward to the opportunity to be on your team and provide impeccable service to you as a buyer and seller.

"Paul Duhamel performed home inspection and everything went wells, It took about 3 hrs and he notified few issues in the house and he answered to all my questions. Very professional and to the point. I refereed to my friends and even he is also happy with the inspection they performed."

Sirisha B on June 2019


Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018


Avatar for Real Estate Inspections

Real Estate Inspections

4.92(
49
)

Real Estate Inspections

4.92(
49
)
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

We offer a complete line of residential and commercial property inspection and testing services. All of our services are performed in house by trained, licensed, and certified inspectors. Our mission is to impart knowledge to our clients. We endeavor to empower our clients with the knowledge they need to make informed Financial, Health & Safety decisions for their family.

"Excellent! See statement"

Peter S on August 2022

We offer a complete line of residential and commercial property inspection and testing services. All of our services are performed in house by trained, licensed, and certified inspectors. Our mission is to impart knowledge to our clients. We endeavor to empower our clients with the knowledge they need to make informed Financial, Health & Safety decisions for their family.

"Excellent! See statement"

Peter S on August 2022


Avatar for Funari Public Adjusters

Funari Public Adjusters

4.90(
61
)

Funari Public Adjusters

4.90(
61
)
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We are a family owned and operated Public Adjusting Firm that has been open since 1987. For over 30 years we have assisted homeowners through the property claims process and have bolstered our business based on our efforts to not only get the greatest settlement possible for our clients, but also by conducting ourselves as courteous professionals who treat our customers with a great deal of respect and consideration. Unfortunately the time when we usually meet for the first time is after some sort of tragic or catastrophic event in the life of a homeowner, i.e. a collapsed roof or burst stack pipe. However, given our attention to detail, knowledge of construction and vast amount of experience we are fully capable of walking you through these no doubt difficult to deal with situations and we can help you come out of it with a great sigh of relief and often a notion of surprise at how great and quick a settlement can come from the claims adjusting process. Give us a call for a free home walk-through and policy evaluation!

"????? Highly Recommended Review: Funari Public Adjusters I am writing to share my experience with Funari Public Adjusters, and I cannot say enough about the exceptional service provided by the owners, Chris and Vito, and their entire team of experts. From the very first call, they were immediately available and responsive, helping me during my critical time of need. The team went above and beyond in every aspect?from assigning a dedicated representative to handle my claim, to guiding me through the entire process from start to finish. Every staff member I interacted with was friendly, professional, and extremely helpful whenever I had questions. I have used this company on three separate occasions, and each time they exceeded my expectations: When a neighbor?s tree fell on the back portion of my home. When I experienced a theft at my rental property, resulting in damages and losses. Most recently, after heavy rains caused significant roof damage to my home, including my top-floor"

Henrietta y on August 2025

We are a family owned and operated Public Adjusting Firm that has been open since 1987. For over 30 years we have assisted homeowners through the property claims process and have bolstered our business based on our efforts to not only get the greatest settlement possible for our clients, but also by conducting ourselves as courteous professionals who treat our customers with a great deal of respect and consideration. Unfortunately the time when we usually meet for the first time is after some sort of tragic or catastrophic event in the life of a homeowner, i.e. a collapsed roof or burst stack pipe. However, given our attention to detail, knowledge of construction and vast amount of experience we are fully capable of walking you through these no doubt difficult to deal with situations and we can help you come out of it with a great sigh of relief and often a notion of surprise at how great and quick a settlement can come from the claims adjusting process. Give us a call for a free home walk-through and policy evaluation!

"????? Highly Recommended Review: Funari Public Adjusters I am writing to share my experience with Funari Public Adjusters, and I cannot say enough about the exceptional service provided by the owners, Chris and Vito, and their entire team of experts. From the very first call, they were immediately available and responsive, helping me during my critical time of need. The team went above and beyond in every aspect?from assigning a dedicated representative to handle my claim, to guiding me through the entire process from start to finish. Every staff member I interacted with was friendly, professional, and extremely helpful whenever I had questions. I have used this company on three separate occasions, and each time they exceeded my expectations: When a neighbor?s tree fell on the back portion of my home. When I experienced a theft at my rental property, resulting in damages and losses. Most recently, after heavy rains caused significant roof damage to my home, including my top-floor"

Henrietta y on August 2025

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Radon Detection and Reduction questions, answered by experts

A DIY kit can lessen the sting that comes with paying for a professional assessment, but these comprehensive tests are true lifesavers. Inspectors are more likely to catch all of the pollutants and hazards in your air. Plus, you’ll still need a professional to verify and act on your DIY test results. 

Some kits don’t include tests for certain air pollutants or only detect their presence, but not their levels (i.e., mold spores). If you’re willing to shell out money for a DIY kit, it’s usually better to stretch your budget slightly higher for a more detailed assessment.

Yes, most services include testing the generator to ensure functionality. Confirm with your provider.

You can buy DIY radon test kits from a home improvement store and conduct radon testing, but these tests are often inaccurate. No matter the result, you should supplement DIY testing with professional radon detection and analysis. DIYers only have access to passive radon tests, which aren’t as reliable as active tests that professionals use. Plus, it’s very easy for DIYers to make mistakes during testing, leading to inaccurate results. If you’re moving into a new home, have concerns about radon, or are due for an updated test, hire a professional. 

Yes, if high levels are detected, professionals can provide solutions for radon reduction.

Keeping radon from getting into your home is much better than having to get rid of it once it's already indoors. While there may not be a way to fully prevent radon from getting into your home, there are things you can do to reduce the gas's ability to enter. 

Sealing foundation cracks and openings can help keep the gas from seeping inside. Improving air flow, such as by opening windows, can also be helpful. If you're building your home from scratch, talk to your contractor about using radon-resistant construction to keep the gas out.

The Boothwyn, PA homeowners’ guide to radon detection and reduction services

From average costs to expert advice, get all the answers you need to get your job done.

What do you need done? We’ll find top pros.
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